Interesting Transmission Symptom - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

Rut Ro · 05-15-2011, 07:41 PM

I searched for several hours through several pages, threads and didn't find anything similair to what I have here.

Car: 1990 240sx w/ SR20 swap
Issue: Too much load in first gear and kills motor.

Car is basically stock other than upgraded turbo, hard pipes, MMIC, BOV, Exhaust, Intake.

So I pulled my tranny cause it got stuck in fifth gear. A shift fork broke. Got another tranny, did the bellhousing swap and put it all back together. After everything was installed, started the car, let her warm up then went to pull out of the driveway. Put her in first, let the clutch out yet it killed the motor. Started her again and same thing. Pulled the car back into the garage, broke her down and installed new clutch, pressure plate with new TOB, pivot ball, TOB sleeve, pilot bushing. Bleed the slave and master. Started her again, same thing. The only gear that drives fine is reverse. All other foward gears kill the motor. Im currently stumped. Going to call a transmission place in the morning but looking for other experiences similair to this and what you found out it was in the end. Thanks in advance.

Rut Ro

Rut Ro · 05-17-2011, 02:13 AM

No one? Anyone? Its a 6 puck Tennesse clutch with a 1800 lb pressure plate if that helps. Adjusted pedal also aswell after bleeding the system. Is there a proper way of breaking in a 6 puck clutch other than the standard 500 to 1000 mile break in period?

mad-ass · 05-17-2011, 02:36 AM

what's the condition of your master/slave clutch cylinders? any funny noises when the car is ideling with gear in netural and clutch engaged?[clutch pedal not pressed in]

kind of willing to bet your clutch slave cylinder is on it's way out. my friend had a similar issue but more severe. your slave cylinder should have at least 1/2 inch of travel to push in the clutch fork.

Rut Ro · 05-17-2011, 05:15 AM

Was thinking that too. Going to replace with a new one friday. Wanted to get a second opinion. Master is good. No leaks. Just a little stumped on why its fine in reverse yet awful in forward gears.

Tantwoforty · 05-17-2011, 05:48 AM

yeah thats odd, it dies no matter how much you rev it?
can you shift freely with the clutch pressed and the engine on?
is it a suddon stop or dose it kind of stumble to a halt?

sent while enduring horrable stomach pain, laying on the bathroom floor..
somethings wrong with me.. lol

Rut Ro · 05-17-2011, 08:38 AM

It pretty much dies at any rpm. I'll have her up to 3500 to 4200 and it will wanna go forward but feels like the clutch is slipping too then it will die.

murda-c · 05-17-2011, 09:45 AM

Maybe you have a stuck shift rod causing multiple gears to be engaged when you put it in a forward gear, locking the tranny.

05-15-2011, 07:41 PM	#1
Rut Ro Leaky Injector Join Date: Jun 2010 Location: Colorado Age: 36 Posts: 72 Trader Rating: (0) Feedback Score: 0 reviews	Interesting Transmission Symptom I searched for several hours through several pages, threads and didn't find anything similair to what I have here. Car: 1990 240sx w/ SR20 swap Issue: Too much load in first gear and kills motor. Car is basically stock other than upgraded turbo, hard pipes, MMIC, BOV, Exhaust, Intake. So I pulled my tranny cause it got stuck in fifth gear. A shift fork broke. Got another tranny, did the bellhousing swap and put it all back together. After everything was installed, started the car, let her warm up then went to pull out of the driveway. Put her in first, let the clutch out yet it killed the motor. Started her again and same thing. Pulled the car back into the garage, broke her down and installed new clutch, pressure plate with new TOB, pivot ball, TOB sleeve, pilot bushing. Bleed the slave and master. Started her again, same thing. The only gear that drives fine is reverse. All other foward gears kill the motor. Im currently stumped. Going to call a transmission place in the morning but looking for other experiences similair to this and what you found out it was in the end. Thanks in advance. Rut Ro Last edited by Rut Ro; 05-15-2011 at 07:43 PM.. Reason: derp

05-17-2011, 02:36 AM	#3
mad-ass Nissanaholic! Join Date: Jun 2007 Location: Nor Cal Posts: 2,273 Trader Rating: (14) Feedback Score: 14 reviews	what's the condition of your master/slave clutch cylinders? any funny noises when the car is ideling with gear in netural and clutch engaged?[clutch pedal not pressed in] kind of willing to bet your clutch slave cylinder is on it's way out. my friend had a similar issue but more severe. your slave cylinder should have at least 1/2 inch of travel to push in the clutch fork. __________________

05-17-2011, 09:45 AM	#7
murda-c Post Whore! Join Date: Jan 2007 Location: Montgomery County, MD Age: 33 Posts: 3,197 Trader Rating: (1) Feedback Score: 1 reviews	Maybe you have a stuck shift rod causing multiple gears to be engaged when you put it in a forward gear, locking the tranny. __________________

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05-17-2011, 02:13 AM	#2
Rut Ro Leaky Injector Join Date: Jun 2010 Location: Colorado Age: 36 Posts: 72 Trader Rating: (0) Feedback Score: 0 reviews	No one? Anyone? Its a 6 puck Tennesse clutch with a 1800 lb pressure plate if that helps. Adjusted pedal also aswell after bleeding the system. Is there a proper way of breaking in a 6 puck clutch other than the standard 500 to 1000 mile break in period?

05-17-2011, 05:15 AM	#4
Rut Ro Leaky Injector Join Date: Jun 2010 Location: Colorado Age: 36 Posts: 72 Trader Rating: (0) Feedback Score: 0 reviews	Was thinking that too. Going to replace with a new one friday. Wanted to get a second opinion. Master is good. No leaks. Just a little stumped on why its fine in reverse yet awful in forward gears.

05-17-2011, 05:48 AM	#5
Tantwoforty Nissanaholic! Join Date: May 2009 Location: Riverside ca Age: 31 Posts: 1,890 Trader Rating: (20) Feedback Score: 20 reviews	yeah thats odd, it dies no matter how much you rev it? can you shift freely with the clutch pressed and the engine on? is it a suddon stop or dose it kind of stumble to a halt? sent while enduring horrable stomach pain, laying on the bathroom floor.. somethings wrong with me.. lol

05-17-2011, 08:38 AM	#6
Rut Ro Leaky Injector Join Date: Jun 2010 Location: Colorado Age: 36 Posts: 72 Trader Rating: (0) Feedback Score: 0 reviews	It pretty much dies at any rpm. I'll have her up to 3500 to 4200 and it will wanna go forward but feels like the clutch is slipping too then it will die.